JPS5465317A - Motor drive unit - Google Patents

Motor drive unit

Info

Publication number
JPS5465317A
JPS5465317A JP13098377A JP13098377A JPS5465317A JP S5465317 A JPS5465317 A JP S5465317A JP 13098377 A JP13098377 A JP 13098377A JP 13098377 A JP13098377 A JP 13098377A JP S5465317 A JPS5465317 A JP S5465317A
Authority
JP
Japan
Prior art keywords
circuit
relay
shortcircuiting
semiconductor device
motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP13098377A
Other languages
Japanese (ja)
Inventor
Atsunori Saito
Fumio Otsuka
Masao Sakurai
Shunji Okumura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denso Corp
Original Assignee
NipponDenso Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NipponDenso Co Ltd filed Critical NipponDenso Co Ltd
Priority to JP13098377A priority Critical patent/JPS5465317A/en
Publication of JPS5465317A publication Critical patent/JPS5465317A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To protect a speed control semiconductor device from the start inrush current by setting up a shortcircuiting circuit in parallel with it and holding the circuit for a fixed time until start stationary revolution, then switching it into the semiconductor speed control.
CONSTITUTION: A speed control circuit to control the speed of a motor 3 by the load current of a power transistor (semiconductor device) and a relay 5 to selectively switch a shortcircuiting circuit which shortcircuits it are set up and its ever- close contacts 5b and 5c form the shortcircuiting circuit and control circuit, respectively. This relay 5 and the relay 4 to perform the start opening and closing of the motor 3 are connected in series. When the ever-open contact 4b of the relay 4 closes, the shortcircuiting circuit is held for a fixed time by the contact 5b of the relay 5. At stationary revolution, a transistor 7 turns ON by a time limit circuit 11 and a start detection transistor 12, then the shortcircuiting circuit is switched into the control circuit by the contact 5c. As a result, the semiconductor device can be protected from the motor start inrush current.
COPYRIGHT: (C)1979,JPO&Japio
JP13098377A 1977-11-01 1977-11-01 Motor drive unit Pending JPS5465317A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13098377A JPS5465317A (en) 1977-11-01 1977-11-01 Motor drive unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13098377A JPS5465317A (en) 1977-11-01 1977-11-01 Motor drive unit

Publications (1)

Publication Number Publication Date
JPS5465317A true JPS5465317A (en) 1979-05-25

Family

ID=15047163

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13098377A Pending JPS5465317A (en) 1977-11-01 1977-11-01 Motor drive unit

Country Status (1)

Country Link
JP (1) JPS5465317A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56159979A (en) * 1980-05-12 1981-12-09 Diesel Kiki Co Ltd Revolution controlling circuit for dc motor
JPS5715694U (en) * 1980-07-01 1982-01-27

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56159979A (en) * 1980-05-12 1981-12-09 Diesel Kiki Co Ltd Revolution controlling circuit for dc motor
JPS6249833B2 (en) * 1980-05-12 1987-10-21 Diesel Kiki Co
JPS5715694U (en) * 1980-07-01 1982-01-27

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